Incorporation of nitrogen and phosphorus in the leaves of Typha domingensis Pers. macrophyte during treat dairy cattle wastewater in constructed wetlands

ABSTRACT The objective of this study was to evaluate the performance of macrophyte Typha domingensis Pers. in different development stages in the nitrogen and phosphorus removal from a horizontal flow constructed wetland (WCH) applied for dairy cattle wastewater treatment. In this way, growth, nitrogen and phosphorus levels in the leaf tissue of macrophytes were monitored during a 120-day growth period. Typha domingensis Pers. macrophyte was responsible for a mean removal of 5.12 and 3.16% of the applied loads in the WCH, for nitrogen and phosphorus, respectively. The higher nutriens removal rates (30.2 and 6.4 g P kg-1) were identified when the higher tissue growth rates occurred (24.17 cm week-1).

摘要 本研究旨在评估不同生长阶段的多香蒲（Typha domingensis Pers.）在应用于奶牛养殖废水处理的水平流人工湿地（horizontal flow constructed wetland, WCH）中的氮磷去除效能。本研究于120天的生长周期内，对该大型水生植物的生长状况及其叶组织中的氮、磷含量进行了监测。结果显示，多香蒲在该水平流人工湿地中对氮、磷投加负荷的平均去除率分别为5.12%与3.16%。当叶组织生长速率达到峰值（24.17 cm·周⁻¹）时，对应实现了更高的营养盐去除率，分别达30.2与6.4 g P·kg⁻¹。